flat rate
A flat rate is a provider's flat-rate tariff in which the user is charged a flat rate irrespective of the connection time, distance, and data volume transferred.
It is a billing method with flat rates for the basic fee and for certain services in which both the connection charges, the data volume and also the provider costs are included. Flat rates are available for companies and private customers, for access to the Internet, for telephone calls in the fixed network, for voice and video services, and as a cell phone flat rate for communication in mobile networks. Services not included in the flat rate are billed separately.
An alternative calculation model is that of airtime, i.e., the time in which a radio channel is made available for the transmission of user and call data.